Determination of agricultural crops alternative on karst springs irrigation land based on irrigation water quality in Tuban Regency, East Java, Indonesia
H Siswoyo, M Bisri, M Taufiq, V Pranantya

Department of Water Resources Engineering, Faculty of Engineering, Brawijaya University
Jl. M.T. Haryono 167, Malang, 65145, East Java, Indonesia

Abstract

The purpose of this study was to determine alternative high economic-value non-paddy agricultural crops that can be cultivated on agricultural land with irrigation water sources originating from karst springs. This research was conducted on 10 karst springs that are used as a source of irrigation water to irrigate agricultural land in Tuban Regency. Determination of alternative of types of non-paddy agricultural crops is done by integrating the irrigation water quality index model, criteria of relative tolerance of crops to salt, and criteria of non-paddy agricultural crops that have high economic value. Irrigation water quality index values from karst springs in the study area ranged from 73.99 to 76.23, which is in the range of 70–85 with a low water use restriction. Based on the irrigation water quality index values it can be recommended that water supply from karst springs is not carried out on salt sensitive crops. The alternative of types of non-paddy agricultural crops that can be recommended for planting on agricultural land in the study area are corn (Zea mays), soybeans (Glycine max), peanuts (Arachis hypogaea), sweet potatoes (Ipomoea batatas), tomatoes (Lycopersicon lycopersicum), eggplants (Solanum melongena), cucumbers (Cucumis sativus), spinach (Spinacia oleracea), melons (Cucumis melo), and watermelons (Citrullus lanatus).

Keywords: agricultural crops, irrigation, karst springs, water quality

Topic: Civil Engineering